Track and conduit construction for underground electric street-railways.



'No. 650,094. Patented May 22,1900.

- H. nomamsou. 1 V TRACK AND CONDUIT CUNSTBUCTIUN FOR UNDERGROUNDELECTRIC STREET BAILWAYS.

(No Model.) (Application filed Aug. 18, 1899.) 2 sheatsH-sheet I.

No. 650,094. Patented May 22 I900 J. H. noazmsou.

TRACK AND OONDOIT CONSTRUCTION FOR UNDERGROUND ELECTRIC STREET 1RAILWAYS.

(Application filed Aug. 18, 1899.) 3 (No Model.) 2 Sheets-Sheet 2 I I Zx i fidzhedwe 1- JQ N L 8 S *NS m W in: Noam vzTsns co, PHOTO-LH'HQ,WAiHINGTON. n, c.

PATENT OFFICE mwsmmwhammn JOHN H. ROBERTSON, on NEW YORK,

ALBERT J. ELIAS, or SAME PLACE, MARYLAND.

N. Y., ASSIGNOR'OF TWO-THIRDS TO AND LOUIS DUNCAN, OF BALTIMORE,

TRACK AND CONDUIT CONSTRUCTION FOR UNDERGROUND ELECTRIC STREET-RAILWAYS.

QPTECIFICATION forming part of Letters latent No. 650,094, dated May 22,1900.

Application filed August 18, 1899.

To aZZ whom it may concern.-

Be it known that 1, JOHN H. ROBERTSON,

a citizen of the United States, and a resident of the borough ofManhattan, in the city and State of New York, have invented a new anduseful Improvement in Track and Conduit Construction for UndergroundElectric Street- Railways, of which the following is a specificationi Myinvention relates to certain improvements in track and conduitconstruction for underground electric street-railwayswhereby aneasy-riding track is secured, which construction will be very strong, soas to success- I 5 fully withstand the severe strains to whichstreet-railway structures are subjected.

A practical embodiment of my invention is represented in theaccompanying drawings, in which Figure 1 represents a verticaltransverse section through the structure at a point adjacent to one ofthe yokes. Fig. 2 is a top plan View of the same. Fig. 3 is a View inside elevation, and Fig. i is a vertical longitudinal section taken inthe plane of the line 4 4 of.

Fig. 1.

The track-rails are denoted by A A, and the slot-rails of the conduit,which are located between the trackuails, are denoted by B B.

The conduit-yoke is shown as comprising three pieces permanently rivetedtogether viz., an I-beam 0, arranged transversely to the structure, andtwo side pieces 0 C The I-beam O is preferably of steel, and the sidepieces 0' C are preferably made of cast-iron. The rivets for securingthe side pieces to the I-beam are denoted by c, which rivets secure thetop of the I-beam rigidly to the bottom of the said side pieces.

The slot-rails B B are secured to the tops of the side pieces 0 C of theyoke by means of suitable boltsb b, which pass through the faces of thesaid slot-rails and through a portion of the side pieces. W I

The outer upper ends of the side pieces 0 O are provided with seats 0 cfor the reception therein of longitudinal wooden stringers D D, upon thetop surfaces of which stringers rest the bases of the track-rails A A.The

bases of the track-rails are held in engage- Serial No. 727,682. (Nomodel.)

ment with the tops of the stringers and the stringers clamped securelywithin the side pieces by means of pairs of clips a a, which are engagedby pairs of bolts 0. a These wooden stringers D D are preferably of se-.lected yellow pine creosoted and planed to size, so as to fit snugly inthe seats in the side pieces.

Braces E E serve to rigidly space the trackrails A A from the sidepieces 0' 0 These braces E E are of a considerable depth and haveextended bearings at their outer ends along the webs of the track-railsand extended bearings at their inner ends on the tops of the sidepieces. Bolts 2 pass through the lat= orally-extended ends of the bracesE E and the webs of the rails A A for rigidly securing the inner ends ofthe braces to the said side pieces. Y

Tie-rods F F serve to rigidly connect the track-rails with theslot-rails. In the present instance the outer ends of these tie-rods areriveted at f to the braces E E adjacent to the track-rails, and theirinner ends pass through the webs of the slot-rails and are there held inposition by nuts f.

It will be seen that in the structure hereinabove described thetrack-rails rest upon the wooden stringers instead of directly upon theyoke, thus securing a very easy-riding track. i

The two braces, one for connecting the track-rails with the side piecesof the yoke and the other for connecting the track-rails with theslot-rails, serve to produce a Very simple and strong construction, theextended bearing which the braces which connect the track-rails with theyoke have with the said parts being of the utmost importance inproducing a rigid structure.

What I claim is 1. In a track and conduit construction, a pair oftrack-rails, a pair of slot-rails, a conduit-yoke, longitudinalstringers carried by the yoke for supporting the track-rails, braces 5secured to the yoke and to the track-rails and tie-rods for rigidlyconnecting the track-rails and slot-rails, substantially as set forth.

2. In a track and conduit construction, a pair of track-rails, a pair ofslot-rails, a yoke 10o 4.. In a track and conduit construction, a'

trackrail, yoke, a Iongitudinally-extended stringer seated within theyoke imposition to a support the track-rail and a plurality of clipsserving the double purpose of clamping the base of the track-rail to thetop of the stringer and the stringer within the, yoke, substantially asset forth.

' In testimony that 'I claim the foregoing as my invention I have signedmy name, in presence of two Witnesses, this 8th day of July, 1899. .v

JOHN H. ROBERTSON. Witnesses:

H WILLIAM I-LMILLER,

ROBERT SPROUT.,,.

